Publications
Results
- Showing results for:
- Reset all filters
Search results
-
Journal articleSouthwood D, 2014,
Saturn's mysterious magnetism
, ASTRONOMY & GEOPHYSICS, Vol: 55, Pages: 13-18, ISSN: 1366-8781 -
Journal articlePulupa MP, Bale SD, Salem C, et al., 2014,
Journal of Geophysical Research: Space Physics
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 647-657, ISSN: 2169-9380- Author Web Link
- Cite
- Citations: 30
-
Journal articleAndriopoulou M, Roussos E, Krupp N, et al., 2014,
Spatial and temporal dependence of the convective electric field in Saturn's inner magnetosphere
, ICARUS, Vol: 229, Pages: 57-70, ISSN: 0019-1035- Author Web Link
- Cite
- Citations: 34
-
Journal articleMitchell JJ, Schwartz SJ, 2014,
Isothermalmagnetosheath electrons due to nonlocal electron cross talk
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 1080-1093, ISSN: 2169-9380- Author Web Link
- Cite
- Citations: 12
-
Journal articleChakravorty S, Chowdary JS, Gnanaseelan C, 2014,
Epochal changes in the seasonal evolution of tropical Indian Ocean warming associated with El Niño
, Climate Dynamics, Vol: 42, Pages: 805-822, ISSN: 0930-7575 -
Journal articleCollinson GA, Sibeck DG, Masters A, et al., 2014,
A survey of hot flow anomalies at Venus
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 978-991, ISSN: 2169-9380- Author Web Link
- Cite
- Citations: 18
-
Journal articleChaston CC, Bonnell JW, Wygant JR, et al., 2014,
Observations of kinetic scale field line resonances
, GEOPHYSICAL RESEARCH LETTERS, Vol: 41, Pages: 209-215, ISSN: 0094-8276- Author Web Link
- Cite
- Citations: 68
-
Journal articleMatteini L, Horbury TS, Neugebauer M, et al., 2014,
Dependence of solar wind speed on the local magnetic field orientation: Role of Alfvenic fluctuations
, Geophysical Research Letters, Vol: 41, Pages: 259-265, ISSN: 0094-8276We report an analysis of correlations between magnetic field and velocity fluctuations in the fast solar wind beyond 1 AU at high latitudes. We have found that on scales shorter than the microstream structures, there exists a well‐defined dependence of the flow speed on the angle between the magnetic field vector and the radial direction. Solar wind is found to be slightly faster when the measured magnetic field vector is transverse to the velocity, while it is always slower when the magnetic field is parallel, or antiparallel, to the radial direction. We show that this correlation is a direct consequence of the high Alfvénicity of fast wind fluctuations and that it can be reasonably described by a simple model taking into account the main properties of the low‐frequency antisunward Alfvén fluctuations as observed in the solar wind plasma. We also discuss how switchbacks, short periods of magnetic field reversals, naturally fit in this new observed correlation.
-
Journal articleErdos G, Balogh A, 2014,
MAGNETIC FLUX DENSITY IN THE HELIOSPHERE THROUGH SEVERAL SOLAR CYCLES
, ASTROPHYSICAL JOURNAL, Vol: 781, ISSN: 0004-637X- Author Web Link
- Cite
- Citations: 11
-
Journal articleMatta M, Galand M, Moore L, et al., 2014,
Numerical simulations of ion and electron temperatures in the ionosphere of Mars: Multiple ions and diurnal variations
, ICARUS, Vol: 227, Pages: 78-88, ISSN: 0019-1035- Author Web Link
- Cite
- Citations: 59
-
Conference paperDaykin-Iliopoulos A, Desai R, 2014,
Performance evaluation of micropropulsion systems with the application of Active Debris Removal
Recent micropropulsion developments have increased the operational capabilities of microsatellites (< 100 kg), to the point where they are being considered for demanding missions such as Active Debris Removal (ADR). This study examines the state-of-the-art micropropulsion options that can be applied to a microsatellite performing a range of orbital manoeuvres such as ADR. To this end a generic system architecture is used for this example scenario with ranging delta-v requirements. A variety of propulsion systems are sized accordingly, and the trade-offs between the differing propulsion technologies evaluated with respect to the power requirements, System-Specific Impulse , and technology readiness level (TRL), as well as a ‘newly defined’ volume driven System-Specific Impulse . It was shown that the high specific impulse (> 2000s) and consequent mass and volume savings of miniaturised Electric Propulsion (EP) systems, such as the miniature ion and colloid thrusters, results in optimal ISSP’s and ISSP’s for the ADR scenario examined. Moreover an in-depth combined quantitative and qualitative analysis identifies delta-v regions most suited to both EP and Chemical Propulsion (CP) systems, as well as highlighting the inherent differences in the varying technologies with respect to volume as well as mass.
-
Journal articleAlconcel LNS, Fox P, Brown P, et al., 2014,
An initial investigation of the long-term trends in the fluxgate magnetometer (FGM) calibration parameters on the four Cluster spacecraft
, GEOSCIENTIFIC INSTRUMENTATION METHODS AND DATA SYSTEMS, Vol: 4, Pages: 43-84, ISSN: 2193-0856 -
Journal articleSheldon L, Czaja A, 2014,
Seasonal and interannual variability of an index of deep atmospheric convection over western boundary currents
, QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY, Vol: 140, Pages: 22-30, ISSN: 0035-9009- Author Web Link
- Cite
- Citations: 16
-
Journal articleBeth A, Garnier P, Toublanc D, et al., 2014,
Modeling the satellite particle population in the planetary exospheres: Application to Earth, Titan and Mars
, Icarus, Vol: 227, Pages: 21-36, ISSN: 0019-1035 -
Journal articleMasters A, Phan TD, Badman SV, et al., 2014,
The plasma depletion layer in Saturn's magnetosheath
, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 119, Pages: 121-130, ISSN: 2169-9380- Author Web Link
- Cite
- Citations: 15
-
Journal articleWeiss Z, Steers EBM, Pickering JC, et al., 2014,
Excitation of higher levels of singly charged copper ions in argon and neon glow discharges
, JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, Vol: 29, Pages: 2256-2261, ISSN: 0267-9477- Author Web Link
- Cite
- Citations: 9
-
Conference paperWhiteside BJ, Brown P, Beek TJ, et al., 2014,
TID Response of a Hybrid AMR Vector Magnetometer
, IEEE Radiation Effects Data Workshop (REDW) is part of the Nuclear and Space Radiation Effect Conference (NSREC), Publisher: IEEE -
Conference paperFox N, Green P, Brindley H, et al., 2014,
TRACEABLE RADIOMETRY UNDERPINNING TERRESTRIAL AND HELIO-STUDIES (TRUTHS): A BENCMARK MISSION FOR CLIMATE
, International Conference on Space Optics (ICSO), Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X- Author Web Link
- Cite
- Citations: 1
-
Book chapterKrasnoselskikh V, Balikhin M, Walker SN, et al., 2014,
The Dynamic Quasiperpendicular Shock: Cluster Discoveries
, MICROPHYSICS OF COSMIC PLASMAS, Editors: Balogh, Bykov, Cargill, Dendy, DeWit, Raymond, Publisher: SPRINGER, Pages: 459-522, ISBN: 978-1-4899-7412-9- Author Web Link
- Cite
- Citations: 2
-
Book chapterAlexandrova O, Chen CHK, Sorriso-Valvo L, et al., 2014,
Solar Wind Turbulence and the Role of Ion Instabilities
, MICROPHYSICS OF COSMIC PLASMAS, Editors: Balogh, Bykov, Cargill, Dendy, DeWit, Raymond, Publisher: SPRINGER, Pages: 25-63, ISBN: 978-1-4899-7412-9- Author Web Link
- Cite
- Citations: 4
-
Journal articleNakamura R, Plaschke F, Teubenbacher R, et al., 2014,
Interinstrument calibration using magnetic field data from the flux-gate magnetometer (FGM) and electron drift instrument (EDI) onboard Cluster
, GEOSCIENTIFIC INSTRUMENTATION METHODS AND DATA SYSTEMS, Vol: 3, Pages: 1-11, ISSN: 2193-0856- Author Web Link
- Cite
- Citations: 12
-
Book chapterGhavamian P, Schwartz SJ, Mitchell J, et al., 2014,
Electron-Ion Temperature Equilibration in Collisionless Shocks: The Supernova Remnant-Solar Wind Connection
, MICROPHYSICS OF COSMIC PLASMAS, Editors: Balogh, Bykov, Cargill, Dendy, DeWit, Raymond, Publisher: SPRINGER, Pages: 557-587, ISBN: 978-1-4899-7412-9- Author Web Link
- Cite
- Citations: 3
-
Book chapterSchwartz SJ, Zweibel EG, Goldman M, 2014,
Microphysics in Astrophysical Plasmas
, MICROPHYSICS OF COSMIC PLASMAS, Editors: Balogh, Bykov, Cargill, Dendy, DeWit, Raymond, Publisher: SPRINGER, Pages: 5-23, ISBN: 978-1-4899-7412-9- Author Web Link
- Cite
- Citations: 1
-
Book chapterMueller-Wodarg ICF, Griffith CA, Lellouch E, et al., 2014,
TITAN Interior, Surface, Atmosphere, and Space Environment Introduction
, TITAN: INTERIOR, SURFACE, ATMOSPHERE, AND SPACE ENVIRONMENT, Editors: MullerWodarg, Griffith, Lellouch, Cravens, Publisher: CAMBRIDGE UNIV PRESS, Pages: 1-9- Author Web Link
- Cite
- Citations: 7
-
Journal articleO'Connor FM, Johnson CE, Morgenstern O, et al., 2014,
Evaluation of the new UKCA climate-composition model - Part 2: The Troposphere
, GEOSCIENTIFIC MODEL DEVELOPMENT, Vol: 7, Pages: 41-91, ISSN: 1991-959X- Author Web Link
- Cite
- Citations: 142
-
Book chapterBalogh A, Bykov A, Cargill P, et al., 2014,
Microphysics of Cosmic Plasmas: Background, Motivation and Objectives
, MICROPHYSICS OF COSMIC PLASMAS, Editors: Balogh, Bykov, Cargill, Dendy, DeWit, Raymond, Publisher: SPRINGER, Pages: 1-4, ISBN: 978-1-4899-7412-9 -
Journal articleMushtaq S, Steers EBM, Pickering JC, et al., 2013,
Selective and non-selective excitation/ionization processes in analytical glow discharges: excitation of the ionic spectra in argon/helium mixed plasmas
, Journal of Analytical Atomic SpectrometryThe increasing use of mixed gases, including helium mixtures, in glow discharge mass spectrometry has led to a need to understand the resulting signal enhancements due to changes in excitation and ionization processes. To understand more fully these processes in glow discharge, we have carried out complementary optical emission spectrometry experiments. The presence of added gases in the plasma gas can cause major changes in the number density of plasma gas ions and metastable atoms and so affects the intensities of spectral lines involving selective and non-selective excitation & ionization processes. We report the results of an experimental investigation on the effect of Ar/He mixed plasmas on the relative emission intensities of various analyte materials including copper, iron and titanium. Selective and non-selective excitation processes which are mainly dependent on the nature of the plasma gas and analyte material are observed and discussed.
-
Journal articleRuffoni MP, Allende Prieto C, Nave G, et al., 2013,
INFRARED LABORATORY OSCILLATOR STRENGTHS OF Fe I IN THE <i>H</i>-BAND
, ASTROPHYSICAL JOURNAL, Vol: 779, ISSN: 0004-637X- Author Web Link
- Cite
- Citations: 20
-
Journal articleMaruca BA, Bale SD, Sorriso-Valvo L, et al., 2013,
Collisional Thermalization of Hydrogen and Helium in Solar-Wind Plasma
, PHYSICAL REVIEW LETTERS, Vol: 111, ISSN: 0031-9007- Author Web Link
- Cite
- Citations: 32
-
Journal articleHietala H, Plaschke F, 2013,
On the generation of magnetosheath high-speed jets by bow shock ripples
, Journal of Geophysical Research: Space Physics, Vol: 118, Pages: 7237-7245, ISSN: 2169-9380[1] The terrestrial magnetosheath is embedded with coherent high‒speed jets of about 1RE in scale, predominantly during quasi‒radial interplanetary magnetic field (IMF). When these high dynamic pressure (Pdyn) jets hit the magnetopause, they cause large indentations and further magnetospheric effects. The source of these jets has remained controversial. One of the proposed mechanisms is based on ripples of the quasi‒parallel bow shock. In this paper, we combine for the first time, 4 years of subsolar magnetosheath observations from the Time History of Events and Macroscale Interactions during Substorms mission and corresponding NASA/OMNI solar wind conditions with model calculations of a rippled bow shock. Concentrating on the magnetosheath close to the shock during intervals when the angle between the IMF and the Sun‒Earth line was small, we find that (1) 97% of the observed jets can be produced by local ripples of the shock under the observed upstream conditions; (2) the coherent jets form a significant fraction of the high Pdyn tail of the magnetosheath flow distribution; (3) the magnetosheath Pdyn distribution matches the flow from a bow shock with ripples that have a dominant amplitude to wavelength ratio of about 9% (∼0.1RE/1RE) and are present ∼12% of the time at any given location.
This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.